Can you find out the missing number in the grid?

An inspection by the superintendent of St. Joseph School was scheduled on the next day. The class teacher Jenifer knew that he would be asking questions from her class and she would have to choose a pupil to answer. To offer a perfect impression over him, the teacher explained certain instructions to the students to maximise the chances of getting correct answer every time.

What did she say to the students?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Which digit occurred maximum times between the number 1 and 1000?

There is something which you can be arrested for attempting but not for successfully completing.

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

What is the Surname of Barbie Doll?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Count the number of triangles in the picture below: